Remove WebGLObject maps from WebGLRenderingContextBase and WebGLContextGroup.

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContext.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webgl/WebGL2RenderingContext.h"
 
 #include "bindings/modules/v8/OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext.h"
 #include "bindings/modules/v8/RenderingContext.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
@@ skipping 117 matching lines @@
                                  requestedAttributes) {}
 
 WebGL2RenderingContext::WebGL2RenderingContext(
     OffscreenCanvas* passedOffscreenCanvas,
     std::unique_ptr<WebGraphicsContext3DProvider> contextProvider,
     const CanvasContextCreationAttributes& requestedAttributes)
     : WebGL2RenderingContextBase(passedOffscreenCanvas,
                                  std::move(contextProvider),
                                  requestedAttributes) {}
 
-WebGL2RenderingContext::~WebGL2RenderingContext() {}
-
 void WebGL2RenderingContext::setCanvasGetContextResult(
     RenderingContext& result) {
   result.setWebGL2RenderingContext(this);
 }
 
 void WebGL2RenderingContext::setOffscreenCanvasGetContextResult(
     OffscreenRenderingContext& result) {
   result.setWebGL2RenderingContext(this);
 }
 
@@ skipping 40 matching lines @@
   visitor->trace(m_webglLoseContext);
   WebGL2RenderingContextBase::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(WebGL2RenderingContext) {
   // Extensions are managed by WebGL2RenderingContextBase.
   WebGL2RenderingContextBase::traceWrappers(visitor);
 }
 
 }  // namespace blink